C
CurtisDunlap
Windows 10 PC.
Intel i7-3770K CPU, ASUS Z77 MB, 16GB RAM, Intel 82579V Gigabit Network Adapter.
Motorola NVG589 device (modem/router/gateway), AT&T Uverse 50mb down 6mb up, stable and fully configured on both IPv4 and IPv6.
Using TCPOptimizer app I have adjusted settings perfectly for my MTU/MSS over IPv4 at 1500 MTU. When I try to adjust the MTU over my IPv6 to MTU 1280 however, my AT&T Motorola device keeps sending configuration data back to the Windows 10 machine and the IPv6 MTU goes back to 1472 MTU, which fragments over the Internet. Fragmenting IPv6 packets are dropped from most websites I visit, thus making it useless to utilize.
I am a fairly advanced user, so please do not bother with cut/paste replies in the hope I will mark your response as an answer. Unless you actually know what is going on here and can provide a sure solution, just pass on an attempt to answer. Thank you in advance!
I have attempted all the standard methods of setting the IPv6 MTU both in Powershell and thru Elevated CMD prompt.
I have tried the following countless times, only to have the settings reset by the Motorola device back to IPv6 MTU of 1472.
netsh interface ipv6 set subinterface "11" mtu=1280 store=persistent
netsh int ipv6 set subinterface "Ethernet" mtu=1280 store=persistent
netsh interface ipv6 set interface 11 routerdiscovery=disabled (<that stops the Gateway from sending MTU data to my Network adapter but it also breaks the whole IPv6 Internet for me as I can no longer reach any websites once that is set. Have to revert that command to "store=enabled" to get it working again.
I set my IPv6 using one of the first two PS commands above, and I get this:
netsh interface ipv6 show subinterface "Ethernet"
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1280 1 47040213 9752237 Ethernet
Then a few seconds later, if I check the same MTU again, it has been reverted to this:
netsh interface ipv6 show subinterface "Ethernet"
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1472 1 46928149 9736780 Ethernet
Below is some of my system config, I use Google DNS for both IPv4 and IPv6:
PS C:\WINDOWS\system32> ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : GamingDesktop
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : attlocal.net
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Intel(R) 82579V Gigabit Network Connection
Physical Address. . . . . . . . . : 88-88-88-88-88-88
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXX::1(Preferred)
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXXX::49(Preferred)
Lease Obtained. . . . . . . . . . : Wednesday, September 16, 2015 5:52:19 AM
Lease Expires . . . . . . . . . . : Friday, October 16, 2015 5:10:01 AM
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXXX:XXXX:XXX:XXXX:XXXX(Preferred)
Link-local IPv6 Address . . . . . : XXXX::XXXX:XXX:XXXX:XXXX%XX(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.80(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, September 16, 2015 5:52:17 AM
Lease Expires . . . . . . . . . . : Friday, October 16, 2015 11:00:44 AM
Default Gateway . . . . . . . . . : XXXX:XXX:XXXX:XXXX::
XXXX::XXXX:XXXX:XXXX:XXXX%XX
192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 76056712
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-8A-12-15-88-88-88-88-87-88
DNS Servers . . . . . . . . . . . : 2001:4860:4860::8844
2001:4860:4860::8888
8.8.4.4
8.8.8.8
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.attlocal.net:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 3:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : XXXX:X:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX(Preferred)
Link-local IPv6 Address . . . . . : XXXX::XXXX:XXX:XXXX:XXXX%X(Preferred)
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 134217728
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-8A-12-15-88-88-88-88-88-88
NetBIOS over Tcpip. . . . . . . . : Disabled
PS C:\WINDOWS\system32>
PS C:\WINDOWS\system32> netsh interface ipv6 show interfaces
Idx Met MTU State Name
--- ---------- ---------- ------------ ---------------------------
1 50 1280 connected Loopback Pseudo-Interface 1
11 10 1472 connected Ethernet
12 50 1280 disconnected isatap.attlocal.net
3 50 1280 connected Local Area Connection* 3
PS C:\WINDOWS\system32> netsh interface ipv6 show subinterfaces
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1280 1 0 1783272 Loopback Pseudo-Interface 1
1472 1 47983970 9917038 Ethernet
1280 5 0 0 isatap.attlocal.net
1280 1 3400 99153 Local Area Connection* 3
*** HERE IS MY QUESTION ***
Q1) Is it possible to stop the Motorola NVG589 device from sending configuration data related to IPv6 back to my computer?
Q2) Is it possible to block the information coming from the Motorola device at the Windows level to prevent the data being sent from reaching my Intel 82579V Network Adapter?
Q3) Is there anything I can do in order to set and keep my IPv6 MTU at 1280?
Continue reading...
Intel i7-3770K CPU, ASUS Z77 MB, 16GB RAM, Intel 82579V Gigabit Network Adapter.
Motorola NVG589 device (modem/router/gateway), AT&T Uverse 50mb down 6mb up, stable and fully configured on both IPv4 and IPv6.
Using TCPOptimizer app I have adjusted settings perfectly for my MTU/MSS over IPv4 at 1500 MTU. When I try to adjust the MTU over my IPv6 to MTU 1280 however, my AT&T Motorola device keeps sending configuration data back to the Windows 10 machine and the IPv6 MTU goes back to 1472 MTU, which fragments over the Internet. Fragmenting IPv6 packets are dropped from most websites I visit, thus making it useless to utilize.
I am a fairly advanced user, so please do not bother with cut/paste replies in the hope I will mark your response as an answer. Unless you actually know what is going on here and can provide a sure solution, just pass on an attempt to answer. Thank you in advance!
I have attempted all the standard methods of setting the IPv6 MTU both in Powershell and thru Elevated CMD prompt.
I have tried the following countless times, only to have the settings reset by the Motorola device back to IPv6 MTU of 1472.
netsh interface ipv6 set subinterface "11" mtu=1280 store=persistent
netsh int ipv6 set subinterface "Ethernet" mtu=1280 store=persistent
netsh interface ipv6 set interface 11 routerdiscovery=disabled (<that stops the Gateway from sending MTU data to my Network adapter but it also breaks the whole IPv6 Internet for me as I can no longer reach any websites once that is set. Have to revert that command to "store=enabled" to get it working again.
I set my IPv6 using one of the first two PS commands above, and I get this:
netsh interface ipv6 show subinterface "Ethernet"
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1280 1 47040213 9752237 Ethernet
Then a few seconds later, if I check the same MTU again, it has been reverted to this:
netsh interface ipv6 show subinterface "Ethernet"
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1472 1 46928149 9736780 Ethernet
Below is some of my system config, I use Google DNS for both IPv4 and IPv6:
PS C:\WINDOWS\system32> ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : GamingDesktop
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : attlocal.net
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Intel(R) 82579V Gigabit Network Connection
Physical Address. . . . . . . . . : 88-88-88-88-88-88
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXX::1(Preferred)
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXXX::49(Preferred)
Lease Obtained. . . . . . . . . . : Wednesday, September 16, 2015 5:52:19 AM
Lease Expires . . . . . . . . . . : Friday, October 16, 2015 5:10:01 AM
IPv6 Address. . . . . . . . . . . : XXXX:XXX:XXXX:XXXX:XXXX:XXX:XXXX:XXXX(Preferred)
Link-local IPv6 Address . . . . . : XXXX::XXXX:XXX:XXXX:XXXX%XX(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.80(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, September 16, 2015 5:52:17 AM
Lease Expires . . . . . . . . . . : Friday, October 16, 2015 11:00:44 AM
Default Gateway . . . . . . . . . : XXXX:XXX:XXXX:XXXX::
XXXX::XXXX:XXXX:XXXX:XXXX%XX
192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 76056712
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-8A-12-15-88-88-88-88-87-88
DNS Servers . . . . . . . . . . . : 2001:4860:4860::8844
2001:4860:4860::8888
8.8.4.4
8.8.8.8
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.attlocal.net:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 3:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : XXXX:X:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX(Preferred)
Link-local IPv6 Address . . . . . : XXXX::XXXX:XXX:XXXX:XXXX%X(Preferred)
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 134217728
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-8A-12-15-88-88-88-88-88-88
NetBIOS over Tcpip. . . . . . . . : Disabled
PS C:\WINDOWS\system32>
PS C:\WINDOWS\system32> netsh interface ipv6 show interfaces
Idx Met MTU State Name
--- ---------- ---------- ------------ ---------------------------
1 50 1280 connected Loopback Pseudo-Interface 1
11 10 1472 connected Ethernet
12 50 1280 disconnected isatap.attlocal.net
3 50 1280 connected Local Area Connection* 3
PS C:\WINDOWS\system32> netsh interface ipv6 show subinterfaces
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1280 1 0 1783272 Loopback Pseudo-Interface 1
1472 1 47983970 9917038 Ethernet
1280 5 0 0 isatap.attlocal.net
1280 1 3400 99153 Local Area Connection* 3
*** HERE IS MY QUESTION ***
Q1) Is it possible to stop the Motorola NVG589 device from sending configuration data related to IPv6 back to my computer?
Q2) Is it possible to block the information coming from the Motorola device at the Windows level to prevent the data being sent from reaching my Intel 82579V Network Adapter?
Q3) Is there anything I can do in order to set and keep my IPv6 MTU at 1280?
Continue reading...